You can reuse an already created Test scenarios/Test cases and associate it to JIRA Issues.
Step 1: Open a Story where you wish to associate the same Test scenario/Test cases >> Go to 'Test Cases/Acceptance Criteria' section
- Click on the Reuse button, then click on Test Case/Test Scenario.
Step 2: Search for the Test scenario/Test Case by "Summary" OR "JIRA ID" with other filters and associate it with the story.
Here is the link to help documentation.